<!DOCTYPE html>
<html lang="en" xmlns:v-on="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>

</head>
<body>
<div id="app">
    <input type="text" v-model="num">
    <button v-on:click="num++">haima</button>
    <h2>{{name}}点击次数为{{num}}</h2>
</div>
<script type="text/javascript">
    var app = new Vue({
        el: "#app",
        data: {
            name: "heima",
            age: 1,
            num: 0,
        },

    });
</script>
</body>
</html>